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(No Model.) 2 Sheets-Sheet 1.

F. L. DOW.

AUTOMATIC BELT SHIFTER; No. 326,633. Patented Sept. 22, 1885.

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(NoModeL) 2 Sheets-Sheet 2.

F. L. DOW. AUTOMATIC BBLTSHIFTB R.

No. 326,633. Patented Sept. 22, 1885.

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vUNITEEI") STATES PATENT "@FFICE.

FRANK L. DOW, OF CAMDEN, NET/V YORK, ASSIGNOR TO FRISBIE 8t STARS- FIELD, OF SAME PLACE.

AUTOMATIC BELT-SHIFTER.

SPECIFICATION forming part of Letters Patent No. 326,633, dated September 22, 1885.

Application filed January 30, 1885. (No model.)

To all whom it may concern- 7 Be it known that I, FRANK L. Dow, of vthe village of Camden, in Oneida county, and State of New York, a citizen of the United States, have invented a new and useful Improvement in an Automatic Belt-Shifter; and I do hereby declare the following to be a full,

-clear, and exact description of the same, ref? erence being bad to the accompanying drawings, and to the letters and figures marked thereon.

My invention relates to an improvement in an automatic belt-shifter, and is designed to furnish an accurate and reliable means of shifting belts from the tight to the loose pulley, and is adapted'to be used on any machinery using such pulleys where the belt is required to be shifted and the machinery stoppedat regular and exact intervals; and it consists in the mechanism and mechanical movements hereinafter more fully described and claimed.

In the accompanying drawings, Figure 1 represents a side view of my automatic beltshifter, taken at line a: m, Fig. 3. The broken lines indicate a portion of the sprocket-wheel removed, showing the machine in the position it would be when the belt is running on the tight pulley, and showing the pawl working on the face of the ratchet-wheel. Fig. 2 is the same view showing the machine in the position it would be when the belt is running on the loose pulley, and showing'the pawl raised from the face of the ratchet-wheel. Fig. 3 represents an end view of my automatic beltshifter, showing itspositionwhen the belt is running on the tight pulley. Fig. 4 is the same view showing the position when the belt is shifted to the loose pulley. Fig. 5 is asection of the ratchet and sprocket wheels. Fig. 6 is an end view of the same. Fig. 7 is a side view of the movable beltshifter. Fig. 8 is a top' or plan view of the same. Fig. 9 is an end View of the same. Fig. 10 is a side view of the pawl which works on the ratchet-wheel. Fig. 11 is a top View of the same. Fig. 12 is a side view of a weighted dog. Fig. 13 is a top View of the same.

Having described my invention in reference to the figures illustrated in the accompanying drawings, I-will now proceed to describe the F represents the frame carrying the machine, 5 5

which may be attached to the frame of any machine to which my invention is applicable. A A represent a tight and loose pulley mounted on shaft a.

a represents a cam rigidly attached to 6o shaft a.

An eccentric on the shaft may be substituted without interfering with the usefulness of my invention.

a is a forked lever working on forked lever is pivoted to the frame at a a represents a pawl pivoted to the lower end of the forked lever a This pawl works on the face of the ratchet-wheelc, the ratchet cam a. This being worked by the cam and lever before mentioned.

Attached rigidly to the ratchet-wheel is a sprocket-wheel, a which moves the endless linked belt, the sprockets fitting the links.

a represents the endless linked belt which 7 fits in the groove on the sprocket-wheel, as shown in Fig. 6. This endless linked belt is made the desired length to give the required time and distance the machine is to run before the belt is shifted.

a represents a projection on the links of the endless belt for engaging the weighted dog.

b represents the weighted dog pivoted to thelowerend of an arm. This dog is weighted to keep it in proximity to the moving belt to engage the projection a on the chain for raising the pawl and releasing the movable beltshifter, as hereinafter more fully described.

0, Fig. 7, represents a reciprocating beltshifter moving in or on ways attached to the c frame.

a is a shoulder or stop on the upper surface of O. This beltshifter carries two projecting pins, 0 and 0 so located as to allow the belt to move between them.

0", Figs. l and 2, represents a projecting handle to move the belt to the tight pulley.

0, Figs. 1, 2, and 9, represents an inclined projection on the shifter to engage the projection on the pawl for raising the same 'to disengage it from the ratchet-wheel.

c is a lever, one end pivoted to theframe at c, and the opposite end to an arm at c.

0 represents the arm which carries the weighted dog b pivoted to the end at a 0 represents a connecting-rod, one end pivoted to the frame and the opposite end to the lower end of arm a" at c. The ratchet and sprocket wheels are pivoted to the frame at c d represents a projection on the pawl to engage the incline c on the belt shifter for raising the pawl when the shifter is moved inwardlyQ S is a spring for moving the shifter inwardly, a her ina te d c ibe -w (h etics he ma hine eing in m n h lesi't ee wn in F 1 cottage s e?- l q flt'il h t ie' ting t p" it trike the weighted dog which it engages, thereby ai n arms we q hi h a se th lett fr m t. s ieul e 70 .1 th lt- 11 f 'erO. which is d wn war ly by pri g Bath i cl n rsit l a f m the far of t ratchet-wheel a thereby shifting the belt to the loose pulley and bringing the machine to a stop. opu't themachine in motion, the opra ra s he el hi t (1 by me n of handle 0 outwardly until the lever c drops back of shoulder 0', thereby allowing the pawl a and weighted dog b to drop. into' position, where they remain until the rojeetion a on the endless link-belt a strikes and raises the dog b and connecting mechanism, thereby allowing the spring S to move the belt-shifter O, shifting the belt, and stopping the machine.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination of a belt-shifter moved by an elastic connection, an endless link-belt moved on a sprocket-wheel, the belt constructed to disengage the belt-shifter, a lever working on and driven by an eccentric or cam on the shaft for moving the endless belt, and a dog pivoted to the lever and working on the ratchet-wheel for moving the link-belt, combined and arranged,substantially as described, for shifting of the belt and stopping the machine at stated intervals.

2. The combination of amovable belt-shifter, an endless link-belt moved on a ratchet and sprocket wheeLand a lever moved by a cam or eccentric carrying. a 10g Working on the ratche -whee f r m vin t ,e some; the en ,55 l nk-belt ceil truqtqd q j jsemt'age h b ftet' t re ulati wr s forthitt u the belt rm he te t9 the 9 6 Mi 5 ubstantially as described.

3 T ti' ein-desq t bed belt-shifter having the following combination? movethe sprocket-wheel driven by an eccena t llklt shiftr 1 moved byfelaisti c connection. an endless linkv b l ra ch t and Spro k t-whe l, s lep wl tric or cant, constructed and arranged to 0p} 6 erate the belt-shifter at fixed periods to stop the machine, arranged substantially as de cr ed,

FRANK L. Dow,

Witnesses:

J n; G. DoR AsoE, CHARLES W. STUART. 

